Linkage apparatus



FIG. 1 is a front view of a linkage apparatus;

FIG. 2 is a rear view of the linkage apparatus of FIG. 1;

FIG. 3 is a top view of the linkage apparatus of FIG. 1;

FIG. 4 is a bottom view of the linkage apparatus of FIG. 1;

FIG. 5 is a right side view of the linkage apparatus of FIG. 1;

FIG. 6 is a left side view of the linkage apparatus of FIG. 1;

FIG. 7 is a perspective view of the linkage apparatus of FIG. 1;

FIG. 8 is a front view of a linkage apparatus wherein the conformationof the inner and outer journal plates are not being claimed;

FIG. 9 is a rear view of the linkage apparatus of FIG. 8;

FIG. 10 is a top view of the linkage apparatus of FIG. 8;

FIG. 11 is a bottom view of the linkage apparatus of FIG. 8;

FIG. 12 is a right side view of the linkage apparatus of FIG. 8;

FIG. 13 is a left side view of the linkage apparatus of FIG. 8; and,

FIG. 14 is a perspective view of the linkage apparatus of FIG. 8.

The broken lines shown in FIGS. 2-4, 6-10 and 13-34 are for illustrativepurposes only and form no part of the claimed design.

The ornamental design for a linkage apparatus, as shown and described.